Coating apparatus



Jan. 19, 1932. J, J K UF 1,842,101.

COATING APPARATUS Filed June 16, 1928 4 Sheets-Sheet 1 FIG': 11

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COATING APPARATUS Filed June 16, 1928' 4 Sheets-Sheet 2 FIG H Z2 5/ JAE 2269 6 2 Z7 Z7 Z WITNESSES INVENTOR:

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J. J. KAUFMANN 1,842,101

COATING APPARATUS Jan. 19, 1932.

Filed June 16, 1928 4 Sheeos$heet 3 FIG'iTZTQ" a mm \W WITNESSES I N VEN TOR:

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Jan. 19, 1932. KAUFMANN COATING APPARATUS Filed June 16, 1928 4 Sheets-Sheet 4 INVENTUK; olvzzzesmzzfizz @2212,

ATTORNEYS.

Patented Jan. 19, 1932 UNITED STATES. PATENT OFFICE).

JAMES J. KAUFMANN, OF'BAYSIDE, NEW YORK, ASSIGZNOB TO DOUGHNUT MACHINE CORPORATION, OF YORK, N. Y., A CORPORATION OF NEW YORK ooArnve APPARATUS Application filed time '16,

Thisinvention relates to apparatus useful in coatingarticles of various kinds with granular or pulverulent material. In suitably designed and arranged forms, such as hereinafter illustrated and described, the ap paratus of my invention is especially'adapted for sugaring or otherwise coating articles of pastry, for example, fried cakes or dough a coating process in a thorough and reliable manner under absolutely sanitary conditions and without waste of coating material. 1

In the drawings, Fig. I is a perspective view of my coating device in a form adapted to be supported on a table or counter.

Fig. II is a perspective view showing the cover lid of the receptacle open, and a removable insert tray withdrawn from said receptacle. r I I Fig. III is a planview of the apparatus minus the cover lid. j 1

Fig. IV shows a cross section, taken as indicated by the arrows IVIV inFig. III.

Fig. V is a fragmentary detail illustration, viewed as indicated by the arrows VV in Fig. IV. j

Fig. VI is a view similar to Fig. I showing my invention embodied in a coatingapparatus of larger capacity, and in a form suitable for support from thefloor. I

Fig. VII is a plan view of the structure of Fig. VI with the top cover removed, and a portion broken out or shown in sectionto ex-- pose important details. Fig. VIII is a transverse sectional view, 7 taken as indicated by the arrows VIIIe-VIII in Fig. VII; and, j r v Fig. IX is a detail section on a largerscale taken as indicated by the arrows IX-{IX in 0 Fig. VII.

1928. Serial No. 285,893.

With reference first to Figs. IV it will be observed that the form of my invention therein shown comprises a box-like receptacle 10, which, in the present instance, is constructed throughout from sheet metal and provided with a lid 11 of like material. The lid 11 is hinged to the receptacle 10 at the back, as indicated at 12 in Figs. II and IV, and when in the full open position, is held from falling by motion-limiting straps13, which are pivotally attached at one end to saidreceptacle while their slotted portions engage headed studs 14 on the lid 11. A pair of latch clamps, 15 are employed to secure the lid 11 tightly. in closed position. These latch clamps 15 comprise double oin-ted handle members 16, which are pivoted to hinge pieces 17at the frontal edge of the lid 11 and provided with cam projections 18 to engage beneath lugs 19 of members 20 secured to the receptacle 10 1n line with thepieces 17. By wedge action between the projections 18 of the handles 16 and the lugs 19 of the members 20, the cover lid 11 is tightly clamped in closed position.

Removable from the receptacle 10 is an insert tray 21, for the articles to be coated, having side and end walls 22 of sheet metal,

and a foraminous bottom 2& of coarse wire,

mesh or the like.. The upper edges of the side and end walls 22 are flared outwardly as shown at 23 so as to predetermine snug fitment of the tray 21 perimetrically within the receptacle 10. For convenience in carrying the tray 21 I equip it at opposite ends with rounded handles 25. To the bottom of the receptacle 10 at or near the ends thereof are centrallysecured by rivets 26, transversely extending leaf springs 27 that serve tosupport the tray 21 with provision therebeneath of an interspace 28 ig. 'IV) for accommodation of just suflicient granular or pulverulent coating material to adequately cover afull charge of articles in said tray.

The springs .27 oppose the action of the latchclamps 15, by causing the. handles 25 ofthe tray 21 to bear upward against the underside of the cover lid 11, when the latter is closed. By virtue ofits snug peri-- metric fit withinthereceptacle 10 and the cushioning action of the springs 27, the tray till 21 is effectively prevented from shifting or rattling when the receptacle is rotated in the manner presently explained.

A cradling frame comprising end standards 81 joined by transversely spaced horizontal tie bars 32 affords the receptacle 10 support for rotation on a horizontal axis. As shown the standards 31 provide, at their tops, bearings 33 to receive trunnion projections of members 3% secured to the opposite ends of the receptacle 10. From F igs. I, II and IV, it is to be especially noted that the trunnion members 34 occupy a position well above the vertical center of the receptacle 10, so that the latter will normally come to rest with the cover lid 11 uppermost, particularly when loaded with the articles which are to be coated. As a means to turn the receptacle 10, I provide a handle which may be secured to, or form a part of one of the trunnions 34.

In operation of the apparatus, the tray 21 is filled with the doughnuts or other articles which are to be coated, and then placed within the receptacle 10. The lid 11 is thereupon swung down and secured by the latch clamps 15, the leaf springs 27 yielding incidental to downward pressure of said lid upon the handles 25, of the tray 21. With the cover lid 11 securely fastened, the loaded receptacle 10 is turned by means of the handle 35 so that the coating material previously introduced is caused to pass back and forth between the tray 21 and the interspace 28 through the reticulate tray bottom 2st. In this way the coating material is caused to seep through and about the mass of articles in the tray 21 until after a short time their surfaces are completely covered. IVhen the tray 21 is filled to capacity, very little individual freedom is accorded the articles during rotation of the receptacle 10, the effect induced in the mass being simulative of a rolling rather than a shifting action so that no damage or deformation takes place in the articles.

To prevent swinging of the receptacle 10 incidental to insertion and removal of the tray 21, I equip the apparatus with a stop 36 which is connected by a universal pivot 37 with one of the longitudinal bars 32 of the cradle frame 30, and has its free end notched to engage the lower corner of the receptacle 10 when swung to the position illustrated, from either of the normal or inactive dotted line positions of Fig. V.

which is generally similar to the first described embodiment but of more ample proportions for handling larger batches of the articles. In this case the receptacle 10a is constructed with a foundation frame or body of wood and interiorly lined with sheet metal, as at 41, while its lower exterior corners are protected by angle pieces 42, also of metal. The cover lid 11a is likewise of wood and faced on the under side and along the edges with sheet metal, as at 43. Along the front and end edges, the cover lid 11a is fitted with angle section metal affording a drop flange to lap the contiguous upper edges of the receptacle 10a, as clearly shown in Fig. VIII. As in the first embodiment, the cover lid 11a is hinged to the back of the receptacle at 12a, but in the present instance closes against a gasket 46 of rubber or the like, seated in a recess around the top of said receptacle. The latch clamps 15a may be generally similar to the latch clamps 15 previously described, and function to secure the cover lid 11a with the gasket &6 in compression to form a tight seal against spill of the coating material. For greater rigidity, the insert tray 21a is also made with a wooden foundation frame 47, providing side and end Walls which are preferably lined with sheet metal, its perimetric fit within the receptacle 10a being very snug. As shown, the tray 21a has a screen bottom 24a, and is equipped at opposite ends with lifting means in the form of rings 25a. A. number of corner and intermediate blocks 27a, 27b sustain the tray 21a with its upper edges substantially flush with the gasket 40 and its screen 24a slightly elevated from the receptacle bottom to define the interspace 28a for the coating material. The cradle or supporting frame 30a of the modification reaches from the floor, and, as shown, is constructed entirely of piping with standard juncture fittings 47 connecting the pipe sections 48. Special fittings 33a centrally of the tops of the frame ends 31a serve as bearings for the trunnion members 34a; and a handle 35a screwed into one of said trunnion members, constitutes the means whereby the receptacle may be rotated. To hold the receptacle 10a against swinging during insertion and removal of the tray 21a I provide a modified type of locking means which has the form of a latch 36a, the same being pivoted at 37a to one of the bearing fittings 33a. When swung to the full line position of Fig. IX, the latch 36a engages a notch or recess in the contiguous trunnion member 34a, and thereby prevents movement of the receptacle 10a for the purpose indicated. The operation of the alternative form of my invention is identical with that of the first form and need not therefore be separately described.

Having thus described my invention, I claim:

1. In apparatus for coating articles such as doughnuts with granular or pulverulent material, a spring-supported box-like receptacle with a rotating axis above the center thereof, means to support said receptacle for rotation, a removable insert tray for the articles having blank side and end walls with a foraminous bottom and an outward fiare around the upper edge to predetermine snug fitment within the receptacle, and said tray sustained in the receptacle with provision of an interspace therebeneath by yielding means that hold the tray against displacement and rattling during rotation of the receptacle.

2. In apparatus for coating articles such as doughnuts with granular or pulverulent material, a spring-supported box-like receptacle with a rotating axis above the center thereof and having a hinged cover lid, clamping means to secure the lid in closed position, cradling-means to support the receptacle for rotation, a removable insert tray for the articles having a foraminous bottom with blank surrounding walls and an outward flare around the upper edge to predetermine snug fitment within the receptacle, and spring means acting in opposition to the clamping means for the cover lid to yieldingly hold the tray against displacement and rattling during rotation of the receptacle. Y

3. In apparatus for coating articles such as doughnuts with granular or pulverulent material, a box-like receptacle with a hinged cover lid, latch clamps including doublejointed members to secure the lid in closed position, a removable insert tray for the articles having a formainous bottom with blank surrounding walls and an outward flare around its upper edge to predetermine snug fitment within the receptacle, and leaf springs in the receptacle to sustain the tray with provision of an interspace therebeneath for the coating material, said springs acting in opposition to the cover lid clamps to hold the tray against displacement and rattling during rotation of the receptacle.

i. In apparatus for coating articles such as doughnuts with granular or pulverulent material, a box-like receptacle with a hinged cover lid, latch clamps including doublejointed members to secure the cover lid in closed position, a removable insert tray for the articles having a foraminous bottom with blank surrounding walls and upstanding handles with an outward fiare around its upper edge to snugly fit all around within the receptacle, and yielding means effective to force the tray handles against the under side of the cover lid in opposition to the latch clamps thereby to hold said tray against up and down movement during rotation of the receptacle.

5. In apparatus for coating articles such as doughnuts with granular or pulverulent material, a box-like receptacle with a hinged cover lid and a removable insert tray for the articles having a foraminous bottom with blank walls, and a cradle-structure to support the receptacle for rotation about a horizontal axis, said axis being above the center of the receptacle to determine a rest position for the latter with the lid uppermost.

6. In apparatus for coating articles such as doughnuts with granular or pulverulent material, a spring-supported box-like receptacle with a rotating axis above the center tiereof and having a hinged cover lid, a removable insert tray having a foraminous bottom and blank surrounding walls with an outward flare around its upper edge to predetermine snug fitment within the receptacle, a cradle-structure to support the receptacle for rotation on a horizontal axis, and universallypivoted means whereby the receptacle 7 may be locked against movement with the cover lid uppermost to facilitate insertion and removal of the tray.

7. In apparatus for coating articles such as doughnuts with granular or pulverulent material, a spring-supported box-like receptacle with. a rotating axis above the center thereof and having a hinged cover lid, a removable insert tray having a foraminous bottom and blank surrounding walls with an outward flare around its upper edge to predetermine snug fitment within the receptacle, a cradle-frame to support the receptacle for rotation on a horizontal axis, and a universally piVoted stop on the frame shiftable from a normal inactive position to lock the receptacle against movement with the lid uppermost during insertion and removal of the tray.'

8. In apparatus for coating articles such as doughnuts with granular or pulverulent material, a box-like receptacle with a hinged cover lid and a removable insert tray for the articles, said tray embodying sheet metal walls with a foraminous bottom, a cradle structure to support the receptacle for rotation about a horizontal axis, said axis being above the center of the receptacle to determine a rest position for the latter with the lid uppermost, and a universally-pivoted stop having a notched outer end cooperative with a lower edge corner of the receptacle whereby the latter may be locked against movement in the position aforesaid to facilitate insertion and removal of the tray.

In testimony whereof, I have hereunto signed my name at 1170. Broadway, New York city, thisl th day of June, 1928'.

JAMES J. .KAUFMANN. 

